Stockholders' Equity - Diluted Earnings per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Equity [Abstract]
Net (Loss) Income	$ (24,594)	$ 9,986
Weighted average number of common shares outstanding (in shares)	30,806	30,513
Dilutive effect of restricted stock grants after application of the treasury stock method (in shares)	0	181
Dilutive shares outstanding (in shares)	30,806	30,694
Basic earnings per share (in dollars per share)	$ (0.80)	$ 0.33
Diluted earnings per share (in dollars per share)	$ (0.80)	$ 0.33